S
M
T
W
T
F
S
29
55°
41°
30
57°
38°
1
56°
30°
2
53°
27°
3
44°
29°
4
45°
35°
5
51°
30°
6
47°
28°
7
43°
36°
8
50°
32°
9
51°
28°
10
43°
23°
11
40°
20°
12
37°
22°
13
36°
23°
14
38°
19°
15
37°
20°
16
34°
20°
17
36°
21°
18
41°
19°
19
38°
20°
20
35°
30°
21
40°
31°
22
41°
29°
23
41°
29°
24
39°
32°
25
49°
31°
26
48°
27°
27
35°
28°
28
35°
26°
29
36°
32°
30
Hist. Avg.
40°
25°
31
Hist. Avg.
40°
25°
1
Hist. Avg.
39°
25°
2
Hist. Avg.
39°
24°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Caldwell
Caldwell's December 2026 forecast shows daily high temperatures ranging from 34° to 57°, with overnight lows between 19° and 41°. The average high for December is 43° with an average low of 28°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Caldwell. See also: January | February | March.
